The word trigonometry originates from the two Greek words 'trigon' and 'metron'. While 'trigon' has the meaning of triangle, 'metron' means to measure. The literal translation of the word trigonometry is to measure triangles.
tria = three gonia = angle metron = measurement
plane trigonometry spherical trigonometry
The Greek word for rose is ,1., rodo, or ,2., triantafyllo
more info needed... what word===========================Answer #2:The English " in " translates to the Greek " σε ".
I think you need to understand algebra 2 before you begin trigonometry
from the greek words alpha and beta, the first 2 letters of the greek alphabet.
Trigonometry is the study of plane and spherical triangles. Plane trigonometry deals with 2 Dimensional triangles like the ones you would draw on a piece of paper. But, spherical trigonometry deals with circles and 3 Dimensional triangles. Plane trigonometry uses different numbers and equations than spherical trigonometry. There's plane trigonometry, where you work with triangles on a flat surface, then there's spherical trigonometry, where you work with triangles on a sphere.
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Two types of trigonometry are recognized: planar and spherical. Planar is 2-dimensional, while spherical is 3-dimensional. Though these are different fields, spherical trigonometry is really just an application of planar trigonometry in several planes.
Converting three dimensional settings for projecting onto 2-d screens requires trigonometry.
I suggest that it is (sin A)^2 + (cos A)^2 = 1